So the last thing I want to mention today is how we can think about electron configurations for ions.

今天我想提到的最后一件事,就是我们怎样考虑离子的,电子构型。

麻省理工公开课 - 化学原理课程节选

So there are two electron configurations in the n equals one shell, if we follow according to the selection rules that we spelled out last day.

如果根据上次课,我们阐明的原子光谱选择定则，我们就会知道在n等于1的那一层,有两种电子图像构型。

麻省理工公开课 - 固态化学导论课程节选